Apparatus for the production of spring clips



April 2, .1940. J. w. SIEMSS APPARATUS FOR THE PRODUCTION OF SPRING CLIPS Filed Feb. 10, 1939 V Patented Apr. 2, 1949 PATENT APPARATUS FOR THE PRODUCTION 01? SPRING CLIPS John Willy Siemss, Hamburg, Germany Application February 10, 1939, Serial-No. 255,685

4 Claims. (01.140-82) the edge wire and to ensure that the round spring I is tightly clamped against the edge wire the above mentioned hook and bent out portion on the ends of the clip arm must lie in different planes.

The production of such a clip is hereinafter described with reference to the accompanying 6 drawing, in which:

Fig. 1 illustrates in elevation an apparatus partly broken away to show the bending of the clip in V-shape,

Fig. 2 shows a part of the apparatus partly in elevation and partly in section showing the last stage in the bending of the clip,

Fig. 3 is a side elevation showing a finishe clip.

The invention is characterized in that the bend of the free ends of the clip I are first bent in the same plane, the arms being bent in V-shape as shown in Fig. l. The free end Z'of one arm is bent in hook-shape and the end 3 of the other arm bent out of the straight line in anoperation not illustrated as it is well known. 35 According to the invention this clip is now placed between two tools 4 and 5, the tool 4 being stationary and the tool 5 shiftable in bearings 6 and rotatable by means of a crank l. 1

The tool 4 has in its centre a slot 8, in which the bend of the clip I is introduced. The tool 5, which has a projection l0 corresponding to a recess 9 in the tool 4, is shifted towards the tool t in the direction of the arrow so thatvthe V-shaped clip I is brought into the spread po- SitiOn la shown in dotted lines in Fig. 1.

As the tool 5 is being shifted in the direction of the arrow l I, a disc I2 fixed on the same axle is shifted into the position IZa, with the result that the disc 52 which has an aperture i3 is 50 movedpast a pressure roller M. This aperture l3 must be provided to enable the disc 12 to be shifted past the pressure roller Hi into the position l2a. Before shifting the disc l2 it must be turned until the aperture i3 is opposite the a roller I4 whereupon by exerting pressure in the direction of the arrow H the disc i2 is moved into the position l2a, the roller I i passing through the aperture. This disc has a sloping face l2 so that, if the crank l is now turned and the tool 5 consequentlyrotated when the disc i2 is in the 3 position l2a, the face of this disc directed towards the crank l will bear tightly against the pressure roller H2- so that the disc lZ is rigidly guided and the clip I, in the position la, is held firmly u between the tool 4 and the tool 5 in the position 50. while the following twisting operation is carried out.

If the crank l is turned for example through the angle of 45 an eye l is formed at the juncture between the two arms, as shown in Fig. 2, lb which is a top plan view of Fig. 1. Only when the crank has been turned further, is the hook I" pulled downwards into the desired curvature, whereas the bending of the bent out end is effected by a tool i5 oscillatable about ,a pin 58.

By swinging this tool about the pin it in the direction it the bent out end 5 is brought into the position shown in Fig. 3. It is important for the clip to be held absolutely firmly, this being attained by the pressure disc I2 and roller M above described.

After the lever l5 has been swung back and the crank i has been turned and slid back into its initial position the clip is finished. The stop ll serves for bending the hook l downwards into the position shown in Fig. 3. In Fig. 2 the tool 5 has been omitted for the sake of clearness.

The apparatus described and illustrated is only given by way of example. It is evident that it can be mechanically driven instead or" manually 3-5 and coupled with any known wire bending machine on which the wire is previously bent into the said V-shape, so that the production of the clip can be fully automatic. However, this production may also be carried out on two separate machines, in which case the mechanically or manually operated apparatus shown in'Fig. l is preferably supplied by hand with the \i-shaped blanks.

I claim:

1. Apparatus for producing a clip for securing springs to edge wires in spring mattresses and the like, comprising in combination a stationary tool adapted to firmly hold a V-shaped blank at the junction between the two arms of the blank,

a second tool arranged coaxially with said stationary tool and having a recess adapted to receive the arms of the V-shaped blank, and means for axially shifting and rotating said second tool relatively tosaid stationary tool to bend an eye at the junction of the two arms of the blank.

2. An apparatus as specified in claim 1, in which the means for axially shifting and rotating the second tool comprising a shaft carrying this second tool at one end, a disc keyed on said shaft at an intermediate point of the length thereof, said disc having an aperture in its periphery and a sloping face on the side remote from said second tool, a crank on the other end of said shaft adapted to axially shift and rotate said shaft with said disc to approach said second tool to said stationary tool, and a stationary roller in the path of movement of said disc, said roller adapted to pass through the aperture in said disc during the axial displacement of said shaft and to cooperate with the sloping face on said disc during the rotation of said shaft to press said second tool tightly against said stationary tool.

3. In an apparatus as specified in claim 1, abutments on the stationary tool, and abutments on the second tool in cooperative relation to the abutments on the stationary tool to bend over the free ends of the blank arms.

4. In an apparatus as specified in claim 1, an abutment in the stationary tool and a lever osciilatably mounted on said stationary tool in cooperative relationship to said abutment to bend over the end of one arm of the blank.

' JOHN VVILLY SIEMSS. 

